Name:Celestine
Origin of name:from the Latin caelestis...celestial, referring to the sky-blue colour
Chemical formula:SrSO4
Celestine, strontium sulphate, occurs as a sedimentary deposit, associated with rock-salt, gypsum and clay.
Celestine is the most common strontium mineral and the main ore. Strontium compounds burn with a crimson flame and are used in the manufacture of flares, fuses and fireworks; they are also used in manufacture of plastics and paints.
Crystal system:orthorhombic
Class:Sulphates
Hardness:3 - 3.5
Cleavage:perfect in one direction, less so in another direction.
Colour:usually blue or colorless, sometimes brownish shades
Specific gravity:3.96 - 3.98

lolz... I M A STONE????lolzzzz